Kurzfassung. In dieser Arbeit wird erstmals das Konzept einer feldfreien Linie (FFL) in der neuen Bildgebungsmodalität Magnetic-ParticleImaging (MPI) anhand von Magnetfeldmessungen validiert. Aufgrund theoretischer Abschätzungen wird eine Sensitivitätssteigerung für MPI um einen Faktor zehn bei Verwendung einer FFL anstelle des konventionell verwendeten feldfreien Punktes (FFP) erwartet. Um sic...

It is well known that, under suitable conditions, microRNAs are able to fine tune the relative concentration of their targets to any desired value. We show that this function is particularly effective when one of the targets is a Transcription Factor (TF) which regulates the other targets. This combination defines a new class of feed-forward loops (FFLs) in which the microRNA plays the role of ...

Several researchers have studied trust in the electronic commerce context. Much of this work is aimed at establishing initial trust, with some recent research on maintaining on-going trust between consumer and vendor. This paper examines a related aspect of trust in the e-Commerce environment, namely trust violations and their subsequent repair. It draws upon research in professional trust rela...

Along the way, by way of illustration, I evaluate various players and teams with respect to baseadvance average. The evaluation of teams leads to further statistical comparisons. Here, the results are equally decisive in favor of base-advance average. For example, over the period 2000-2004, baseadvance average for-and-against predicts wins just as well as runs for-and-against. This is because, ...

Archived data from four courses taught with computer-aided personalized system of instruction (CAPSI) – an online, self-paced, instructional program – were used to explore the relationship between objectively rescored final exam grades, peer reviewing, and progress rate – i.e., the rate at which students completed unit tests. There was a strong positive correlation (r = .68, p < .01) between ra...

Ada has proved to be one of the best languages to learn computer programming. Nevertheless, learning to program is difficult and when it is combined with lack of motivation by the students, dropout rates can reach up to 70%. In order to face up to this problem, we have developed a first-year course for computing majors on programming based on two key ideas: supplementing the final exam with a s...

This study examined students’ grade expectations over the course of a semester. Students provided their expectations at 3 times: within the first week of the semester, midway through the semester, and within the week just prior to the final exam. Results demonstrate that expected grades decreased over the semester and that the rate of change interacted with students’ cumulative grade point aver...

We experimentally explore the underlying pseudoclassical phase space structure of the quantum -kicked accelerator. This was achieved by exposing a Bose-Einstein condensate to the spatially corrugated potential created by pulses of an off-resonant standing light wave. For the first time quantum accelerator modes were realized in such a system. By utilizing the narrow momentum distribution of the...